104195-05-3Relevant academic research and scientific papers
Potent and Prolonged Innate Immune Activation by Enzyme-Responsive Imidazoquinoline TLR7/8 Agonist Prodrug Vesicles
Wang, Bi,Van Herck, Simon,Chen, Yong,Bai, Xiangyang,Zhong, Zifu,Deswarte, Kim,Lambrecht, Bart N.,Sanders, Niek N.,Lienenklaus, Stefan,Scheeren, Hans W.,David, Sunil A.,Kiessling, Fabian,Lammers, Twan,De Geest, Bruno G.,Shi, Yang
, p. 12133 - 12139 (2020)
Synthetic immune-stimulatory drugs such as agonists of the Toll-like receptors (TLR) 7/8 are potent activators of antigen-presenting cells (APCs), however, they also induce severe side effects due to leakage from the site of injection into systemic circulation. Here, we report on the design and synthesis of an amphiphilic polymer-prodrug conjugate of an imidazoquinoline TLR7/8 agonist that in aqueous medium forms vesicular structures of 200 nm. The conjugate contains an endosomal enzyme-responsive linker enabling degradation of the vesicles and release of the TLR7/8 agonist in native form after endocytosis, which results in high in vitro TLR agonist activity. In a mouse model, locally administered vesicles provoke significantly more potent and long-lasting immune stimulation in terms of interferon expression at the injection site and in draining lymphoid tissue compared to a nonamphiphilic control and the native TLR agonist. Moreover, the vesicles induce robust activation of dendritic cells in the draining lymph node in vivo.
X-ray diffraction and high-resolution NMR spectroscopy of methyl 3,4-di-O-acetyl-1,5-anhydro-2-deoxy-d-arabino-hex-1-enopyranuronate
Liberek, Beata,Tuwalska, Dorota,Konitz, Antoni,Sikorski, Artur
, p. 1280 - 1284 (2007)
Single-crystal X-ray diffraction and high-resolution 1H and 13C NMR spectral data for methyl 3,4-di-O-acetyl-1,5-anhydro-2-deoxy-d-arabino-hex-1-enopyranuronate are reported. The 5H4 conformation was found to be the preferred form for this glycal, both in the crystal lattice and in solution. The factors determining the 4H5 ? 5H4 conformational equilibrium for acetylated glycals are discussed.
New antifungal flavonoid glycoside from Vitex negundo
Sathiamoorthy,Gupta, Prasoon,Kumar, Manmeet,Chaturvedi, Ashok K.,Shukla,Maurya, Rakesh
, p. 239 - 242 (2007)
Flavonoids are ubiquitous in photosynthesizing cells and are common part of human diet. For centuries, preparations containing these compounds as the principal physiologically active constituents have been used to treat human diseases. Increasingly, this class of natural products is becoming the subject of anti-infective research. Our bioactivity guided fractionation of ethanolic extract of leaves of Vitex negundo resulted in the isolation of new flavone glycoside (4) along with five known compounds 1-3, 5 and 6. All the isolated compounds were evaluated for their antimicrobial activities. The new flavone glycoside 4 and compound 5 were found to have significant antifungal activity against Trichophyton mentagrophytes and Cryptococcus neoformans at MIC 6.25 μg/ml.
Rapid access to uronic acid-based mimetics of Kdn2en from D-glucurono-6,3-lactone
Florio, Pas,Thomson, Robin J.,Von Itzstein, Mark
, p. 445 - 448 (2000)
A concise route to novel mimetics of Kdn2en, based on Δ4-uronic acids, from D-glucurono-6,3-lactone is presented. Uronic acid-based mimetics in which an aliphatic ether (O-glycoside), a thioether (S-glycoside), or acetamide takes the place of the natural C-6 glycerol sidechain of the sialic acid were synthesized from the key intermediate, methyl 2,3,4-tri-O-acetyl-α-D-glucopyranosyluronate bromide. (C) 2000 Elsevier Science Ltd.
A mechanistic study of the non-oxidative decarboxylation catalyzed by the radical S-adenosyl-l-methionine enzyme BlsE involved in blasticidin S biosynthesis
Liu, Lei,Ji, Xinjian,Li, Yongzhen,Ji, Wenjuan,Mo, Tianlu,Ding, Wei,Zhang, Qi
, p. 8952 - 8955 (2017)
Decarboxylation is a fundamentally important reaction in biology and involves highly diverse mechanisms. Here we report a mechanistic study of the non-oxidative decarboxylation catalyzed by BlsE, a radical S-adenosyl-l-methionine (SAM) enzyme involved in blasticidin S biosynthesis. Through a series of biochemical analysis with isotopically labeled reagents, we show that the BlsE-catalyzed reaction is initiated by the 5′-deoxyadenosyl (dAdo) radical-mediated hydrogen abstraction from a sugar carbon of the substrate cytosylglucuronic acid (CGA), and does not involve a carboxyl radical as has been proposed for 4-hydroxyphenylacetate decarboxylase (HPAD). Our study reveals that BlsE represents a mechanistically new type of radical-based decarboxylase.
Design, synthesis and biological evaluation of carbohydrate-based sulphonamide derivatives as topical antiglaucoma agents through selective inhibition of carbonic anhydrase II
Fan, Zhanfang,Guo, Chun,Hou, Zhuang,Li, Chuanchao,Lin, Bin,Liu, Yang,Liu, Yichuang,Wang, Yitong,Zhang, Miao
, p. 383 - 390 (2019/12/30)
A series of new carbohydrate-based sulphonamide derivatives were designed, synthesised by employing the so-call ‘sugar-tail’ approach. The compounds were evaluated in vitro against a panel of CAs. Compared to their parent compound p-sulfamoylbenzoic acid, these compounds showed nearly 100-fold improvement in their binding affinities against hCA II in vitro. All of compounds showed great water solubility and the pH value of their water solutions of compounds is 7.0. Such properties are advantageous to make them much less irritating to the eye when applied topical glaucomatous drugs, compared to the relatively highly acidic dorzolamide preparations (pH 5.5). Notably, compounds 7d, 7 g, 7 h demonstrated to topically lower intraocular pressure (IOP) in glaucomatous animals better than brinzolamide when applied as a 1% solution directly into the eye. Low cytotoxicity on human cornea epithelial cell was observed in the tested concentrations by the MTT assay.
Indole-glucoside substrate and preparation method and application thereof in detection of aerobe vaginitis (AV)
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Paragraph 0016, (2018/09/11)
The invention discloses a glycosyl donor synthetic process, aiming to overcome defects in detection of aerobe vaginitis (AV) by the prior art. Glycosyl donor is connected with chromogen indole to generate glucosides, and an indole-glucoside substrate with good effect, high flexibility, high stability and high specificity is then synthetized. According to inspection standards, as a comparison result between the color rendering property of the synthetized substrate and that of conventional AV detection reagents, the color rendering property of the substrate is superior to that of a Chromagar AVdetection reagent. With innovation of the glycosyl donor synthetic process and the synthetic process of gluocosides by connection for synthesis of the indole-glucoside chromogenic substrate, innovation of extraction and purification and application verification, reaction yield of each stage of products is increased greatly, the products are white nearly, influence from color of the substrate to identification process is reduced, and flexibility and accuracy of AV detection are both improved greatly.
A combinatorial approach towards the synthesis of non-hydrolysable triazole-iduronic acid hybrid inhibitors of human α-l-iduronidase: Discovery of enzyme stabilizers for the potential treatment of MPSI
Cheng, Wei-Chieh,Lin, Cheng-Kun,Li, Huang-Yi,Chang, Yu-Chien,Lu, Sheng-Jhih,Chen, Yu-Shin,Chang, Shih-Ying
supporting information, p. 2647 - 2650 (2018/03/21)
Preparation of substituent-diverse, triazole-iduronic acid hybrid molecules by click reaction of an azido iduronic acid derivative with randomly chosen alkynes is described. Library members were screened for their ability to inhibit α-l-iduronidase, and hit molecules and analogues were then investigated for their ability to stabilize rh-α-IDUA in a thermal denaturation study. This work resulted in the discovery of the first small molecules that can be used to stabilize exogenous rh-α-IDUA protein in vitro.
CONJUGATES COMPRISING SELF-IMMOLATIVE GROUPS AND METHODS RELATED THERETO
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Page/Page column 172; 173, (2017/06/27)
In some aspects, the invention relates to an antibody-drug conjugate, comprising an antibody; a linker; and an active agent. The antibody-drug conjugate may comprise a self- immolative group. The linker may comprise an O-substituted oxime, e.g., wherein the oxygen atom of the oxime is substituted with a group that covalently links the oxime to the active agent; and the carbon atom of the oxime is substituted with a group that covalently links the oxime to the antibody.
CONJUGATES COMPRISING PEPTIDE GROUPS AND METHODS RELATED THERETO
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Page/Page column 182, (2017/08/08)
In some aspects, the invention relates to an antibody-drug conjugate, comprising an antibody; a linker; and at least two active agents. In preferred embodiments, the linker comprises a peptide sequence of a plurality of amino acids, and at least two of the active agents are covalently coupled to side chains of the amino acids. The antibody-drug conjugate may comprise a self-immolative group, preferably two-self-immolative groups. The linker may comprise an O-substituted oxime, e.g., wherein the oxygen atom of the oxime is substituted with a group that covalently links the oxime to the active agent; and the carbon atom of the oxime is substituted with a group that covalently links the oxime to the antibody.
